1.




2.		 Regnier, Kathleen / Gross, Michael / Zimmerman, Ron
The Interpreter's Guidebook
Techniques for Programs and Presentations
University of Wisconsin, Stevens Point/Wisconsin (1992)

Heintzman, James / Gross, Michael / Zimmerman, Ron
Interpreter's
Handbook




3.		 Making the Right Connections
A Guide for Nature Writers
University of Wisconsin, Stevens Point/Wisconsin (1988)

Zehr, Jeffrey / Gross, Michael / Zimmerman, Ron
Series
Creating Environmental Publications
A Guide to Writing and Designing for Interpreters and Environmental Educators
University of Wisconsin, Stevens Point/Wisconsin (1991)
4. Trapp, Suzanne / Gross, Michael / Zimmerman, Ron
Signs, Trails, and Wayside Exhibits
Connecting People and Places
University of Wisconsin, Stevens Point/Wisconsin (1994)
umfaßt
vier Bände